Piezoelectric device

Abstract

A piezoelectric device includes a piezoelectric layer including first and second principal surfaces opposed to each other, a support on a second principal surface side of the piezoelectric layer, a first functional electrode on at least one of the first and second principal surfaces, a substrate opposed to the first principal surface of the piezoelectric layer with a space therebetween and including a second functional electrode, and a shield between the piezoelectric layer and the substrate. The shield at least partially overlaps the first functional electrode in plan view in the first direction. A distance from a center of the shield to the piezoelectric layer is smaller than a distance from the center of the shield to the substrate.

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